Population genomics and environmental adaptation in the sea scallop, Placopecten magellanicus, detected using RAD-seq derived SNPs and experimental larval rearing
Understanding the scale of connectivity and adaptation among marine populations can inform fisheries conservation and management. We used a combination of advanced genomic techniques and experimental methods to determine the scale of connectivity and adaptation in the sea scallop, Placopecten magell...
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| Format: | Thesis |
| Language: | English |
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Memorial University of Newfoundland
2017
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| Online Access: | https://research.library.mun.ca/12538/ https://research.library.mun.ca/12538/1/thesis.pdf |
| Summary: | Understanding the scale of connectivity and adaptation among marine populations can inform fisheries conservation and management. We used a combination of advanced genomic techniques and experimental methods to determine the scale of connectivity and adaptation in the sea scallop, Placopecten magellanicus. Restriction-site Associated DNA sequencing genotyped 7163 SNPs in 245 individuals across 12 populations in the Northwest Atlantic. Subsequent analysis of these data identified a strong separation between populations north and south of Nova Scotia and identified an association between population structure and the coldest temperatures experienced by scallop populations. Common garden experiments on a northern and southern populations found that larvae from the north grew more quickly overall, potentially an adaptive strategy to the northern winter. These observations contribute to growing evidence of fine-scale population structure and adaptation in marine systems and support the hypothesis that a combination of limited dispersal and adaptive differentiation drives sea scallop population structure. |
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